Is there a video, or a detailed explanation for the proper way to remove the hairspring stud from the balance, as well as insert the stud back on to the balance bridge for the ETA Chron system, as found in a 2824-2 movement? I know there is a special tool for this and it would be nice to see that demonstrated if nothing else than to see the force required, but also a way to do the detachment and reattachment if you don't have that special tool (as in my situation). I tried pushing the stud bac